Apparatus for making welds.



No. 837,249. PATENTHD NOV. 27, 1906.

v J. G. PERRY.

APPARATUS FOR MAKING WELDS.

Iii.

' UN IITED STATES PATENT OFFICE.

JOHN C. PERRY, OF LA JUNTA, COLORADO, ASSIGNOR TO CLINTON WIRE CLOTH COMPANY, OF CLINTON, MASSACHUSETTS.

APPARATUS FOR. MAKING WELDS.

Patented Nov. 27, 1906.

Original application filed March 23, 1901, Serial No- 52,518- Divided and this application filed July 16, 1904. Serial No- 216.807-

.l'o all whom it may concern:

Be it known'that 1, Joan C. PERRY, of La Junta, in the county of Otero and State of Colorado, have invented certain new and useful Improvements in Ap aratus for Making Welds, of which the folldwing is a specification.

invention relates to an apparatus for making a plurality of welds simultaneously.

Figure 1 infront elevation shows diagrammatically an apparatus constructed in accordance with my invention, the arrangement of parts being such that the current passes in parallel-through all of the joints, the outside plungers being disconnected from the circuit-breaking circuit. Fig. 2 is a like view of an apparatus constructed in accord-' ance with my invention, the welding-current being arranged to pass in series thro h the points to be welde instead of in para lel, as in Fig. 1. Fig. 3 is a diagrammatic view similar to Fig. 2,.showing the arrangement of the parts, the welding-current, however, as in Fig. 2, being arranged to pass in series through the points to be welded. Fig. 4 is a detail perspective view of one of the electrodes or pressure members. Fig. 5 is a detail view showing the manner of connecting the adjustable welding-j aw to its plunger.

The same characters indicate the same parts in all of the figures;

The form of framework shown in my application Serial No. 52,518 (of which this is a division) or any suitable framework may be employed, none being illustrated, as it forms no part or my present invention.

Referring to Fig. 1, 1 represents a transformer adapted for welding-currents, suitably su ported and insulated.- One of the wires 2 tom the source of power is connected to one end of the primary coil of the transformer, the wire from the other end of the primary coil running to an insulated pivoted arm 4 or binding-post of a circuit-breaker 5. The other wire 6 from the source of power leads to the point where the primary circuit may be closed or broken by the arm 4 of the circui breaker 5. 7 represents a stationary electrode, which should be suitably supported and insulated. One branch8 of the sec-- ondary circuit is connected to said electrode. This electrode is shown as provided with a series of projections or weldin j aws 9, suitably grooved to receive a ro bar, or'wire 10. A girth 11 is arranged above the electrode 7 and suitably insulated. In this girth 11 are arranged a series of four plungers 12, each of which at its lower end carries a double pivoted electrode 13, having a groove 14 at each end to receive a rod, bar, or wire 17, the grooves 14 being arranged directly above the welding-j aws 9 and at right angles. to the groove in said jaws. upon each plunger 12 to yiel ingly force the electrodes 13 toward the welding-j aws 9, and thus force the wires 17 and together during the welding operation. The plungers 12 may be raised by any suitable means either manually or 'mechanically operated. The plungers 12 are insulated from the girth 11 and from the other parts of the machine. A branch 18 of the secondary circuit extends from the transformer to each electrode 13 either direct or by way of its plunger, in. any desired or preferred way. 19 represents a block carried by the girth 11 near its center,

suitably insulated from said girth. 20 represents a wire, a few turns of which are taken about the secondary coil of the transformer. One end of this wire is connected to a contact-spring 21, secured on the top of the block 19. The other end of this wire 22 runs to an electromagnet 24. 25 represents a wire running from the contact-screw 26 to the electromagnet 24. '27 represents a bar pivoted at one end to one of the plungers 12. The other end of this bar is slotted to receive a headed pin 24, carried by another bar to provide for the unequal motion of the plungers, the contact-screw 26 being carried by the bar 27 and insulated therefrom. In the form here shown the armature 28 of the electroma et is pivoted and acts as a dog or keeper to old the pivoted arm'4 against the tension of the spring in contact with the terminal of the wire 6. When, however, the circuit is closed through the electromagnet by way of contact through the end of the screw 26 and spring 21, the magnet is vitalized, its armature 28 attracted, thus releasing the arm 4, permitting the spring 30 to A sprin 15 is arranged draw it away from the wire 6, and thus break the spring 15. The circuit is then closed The electrodes 13 press the wires 17 a plurality of welds.

through the primary circuit, and as the metal softens the springs 15 press their respective plungers downward until the com,-

bined motion or average motion of the plungers carrying the bar 27 makes acontactbetween thescrew 26 and the spring 21. Such contact breaks the primary circuit and stops the welding operation.

In Figs. 2 and 3 a secondary circuit from the transformer passes through the two oints to be welded in series, while in Fig. 1 the current passes through the joints to be welded in multiple are or parallel.

In Fig. 1 the multiple-electrode construction shown combines the rocking or self-adjusting motion of the electrode 13 with the means for producing an average amount of upset, the electrode 13 having semicircular ears 14 adapted to fit the complemental recesses in the ends of the plungers 12, which permits the proper gripping by the electrode a of the two wires. In Fig. 1 four plungers are arranged, each being provided with the double-jawed adjustable electrode 13, formed with the semicircular ears 14. The two central plungers are connected by the pivoted insulate-d contact-screw-carr ing bar 27. The. welding-current is applied simultaneously to all the electrodes. The action of the welding-current on the two outside electrodes and the amount of upset there secured will not affect the breaking of the weldingcurrent, but each of said electrodes will automatically adapt itself to the wires engaged by it. In the construction shown in Fig. 1 the action of the welding-current is stopped by the average amount of upset obtained by the electrodes 13 of the two middle plungers 12, that are connected by the bar 27.

I have found in practice that in making Welded fabric of close mesh this construction is entirely satisfactory, since the welding jaws of the electrodes are automatically adjustable and the amount of upset which controls the breaking of the welding-current is controlled by an average amount of upset of I When electrodes are self-adjustin and the breaking of the Welding-current epends upon the average upset of a plurality of welds, the result should be sufficiently uniform and satisfactory if all the welding-jaws or electrodes are not connected up to the mechanism for breaking the weld ing-current.

Having thus explained the nature of my invention and described a way of making and using the same, although without attempting to set forth all of the forms in which it'may be made or all of the modes of its use, what I claim, and desire to secure by Letters Patent, 1s

1. In combination with the cooperative elements of a machine of the class described, a plurality of self-adjusting electrodes combined with means for equalizing the upsetting pressure applied simultaneously through said electrodes.

2. In an electric welding a paratus in combination, a plurality of pl nngers carrying movable welding-jaws, a bar pivotally con nected at one end to one of said plungers and loosely connected at its other end with another of said plungers, circuit-breaking means carried by said bar whereby the movement of said bar to break the welding-circuit is controlled by the average amount of the movement of the two plungers.

3. In an electric welding apparatus, a welding jaw comprising a jaw member formed with grooves, a. contact plate or jaw provided with work-engaging recesses and also provided with trunnions to be arranged in said grooves, and means for retaining the trunnions in place.

4. In combination with the cooperative elements of a machine of the class described, a single transformer, and a plurality of pairs of electrodes or welding-jaws arranged in the welding or secondary circuit of said trans former, and .automatic acting means controlled by the average pairs of jaws arranged to stop automatically the welding action of all said pairs of jaws as a gang.

In testimony whereof I have affixed my signature in presence of two witnesses.

JOHN C. PERRY. Witnesses:

HERBERT B IXBY, JNo. T. RUSSELL 9 upset of two or more 

